diff --git a/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.install b/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.install
index 5e6c011..bcbe5df 100644
--- a/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.install
+++ b/core/modules/contact/tests/modules/contact_storage_test/contact_storage_test.install
@@ -9,7 +9,9 @@
  * Implements hook_install().
  */
 function contact_storage_test_install() {
-  // Install any entity schemas belonging to the module.
+  // ModuleHandler won't create the schema automatically because Message entity
+  // belongs to contact.module.
+  // @todo Remove this when https://www.drupal.org/node/1498720 is in.
   $entity_manager = \Drupal::entityManager();
   $schema = \Drupal::database()->schema();
   $entity_type = $entity_manager->getDefinition('contact_message');